Some people have no manners. I would just ride the positive vibes and let him be. It's no reason to cause a rift.
This x 100000. You're his friend, so you should act like it. Friends need you to have their backs at all times and in all situations. That means shutting down any negative feelings you have about this situation.
To be fair he's a pretty shitty friend. Like eight years ago he said he would fix my mother's laptop, and as thanks they gave him their pool table they didn't want anymore.
Over the years I've seen the laptop all over his basement. Half under the couch, buried in debris while he was renovating it into a man cave, tucked away behind his desk, etc... Fast forward to present day my mother never got it back, and meanwhile he still has their pool table.
Not to mention, no exaggeration, he's literally not shown up to every single party/hangout (at least 5 or 6) we've invited them to this year, despite saying he'd come to nearly every one of them. He still invites us to his barbecues and stuff, and we go to them cuz they're fun, but man.
doesn't really sound like a good friend tbh.
reminds me of that episode of Spongebob: "Squidward's always been there for us when it was convenient for him!" ---
